Memories of Yadra’s childhood in Castro’s Cuba come flooding back as Alzheimer’s sets in, inspiring her daughter Zelia to connect with her heritage. With her wife by her side, Zelia sets out on a journey to excavate family secrets and discover a love that led her mother’s beloved tía to remain in Cuba. Spanning two countries and three generations, Azul fuses music and memory to explore a romance for the ages and the true language of love.